United States Patent: 3047257

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United States Patent

3,047,257

Issue Date:

July 31, 1962

Current U.S. Class: 244/226; 92/48; 244/215; 92/92

Current CPC Class: B64C 3/46 (20130101); F15B 15/10 (20130101); Y02T 50/10 (20130101)

Current International Class: F15B 15/10 (20060101); B64C 3/46 (20060101); B64C 3/00 (20060101); F15B 15/00 (20060101)

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Current U.S. Class:	244/226; 92/48; 244/215; 92/92
Current CPC Class:	B64C 3/46 (20130101); F15B 15/10 (20130101); Y02T 50/10 (20130101)
Current International Class:	F15B 15/10 (20060101); B64C 3/46 (20060101); B64C 3/00 (20060101); F15B 15/00 (20060101)